ISLAMABAD — Pakistan on Tuesday ordered an investigation to discover “the full facts” of how Osama bin Laden lived undetected, likely for years, on its soil until being killed in a US commando raid on May 2.

Prime Minister Yousuf Raza Gilani announced that an independent commission would probe the circumstances of the Al-Qaeda chief’s presence in Abbottabad, a garrison town north of Islamabad, where he was gunned down by US Navy SEALs.

The unveiling of an investigation into the episode, which threw ties between allies Pakistan and the United States into turmoil, follows demands from lawmakers in Washington and Islamabad for disclosure on the bin Laden affair.

The commission will comprise a five member panel headed by Justice Javed Iqbal, a senior judge of the Supreme Court, and is mandated “to ascertain the full facts regarding the presence of Osama bin Laden in Pakistan.”